/Engine/Source/Runtime/Interchange/Core/Public/Types/AttributeStorage.h
Return the attribute type if the key exist, return None if the key is missing
[EAttributeTypes](API\Runtime\InterchangeCore\Types\UE__Interchange__EAttributeTypes) GetAttributeType ( const [FAttributeKey](API\Runtime\InterchangeCore\Types\FAttributeKey) & ElementAttributeKey ) const